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See detailAttraction of wireworms to root-emitted volatile organic compounds of barley
Barsics, Fanny ULg; Haubruge, Eric ULg; Verheggen, François ULg

Conference (2011, June 20)

The ability of wireworms (Agriotes sordidus Illiger) to orientate towards a blend of volatiles emitted by chopped roots of barley was tested. During individual tests, the larvae chose between the two ... [more ▼]

The ability of wireworms (Agriotes sordidus Illiger) to orientate towards a blend of volatiles emitted by chopped roots of barley was tested. During individual tests, the larvae chose between the two sides of a Y-shaped olfactometer. One side was connected to a chamber containing the chopped roots and the other was connected to an empty chamber. Wireworms chose significantly more often the side of the olfactometer providing the blend of root volatiles. This result underlines the importance of the identification of these compounds and their role assessment alone or combined, as for their effect on wireworms. Such compounds could be used in IPM strategies. [less ▲]

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See detailPaleoearthquakes from Turbidites in the SISCOR project
Beck, Christian; Hubert, Aurelia ULg

Conference (2011, June 20)

Detailed reference viewed: 38 (6 ULg)
See detailLie antialgebras
Kreusch, Marie ULg

Conference (2011, June 20)

Lie antialgebras which is a $\Z_2$-graded commutative algebra (but not associative) was introduced in 2007 by Valentin Ovsienko. This notion takes place in the superspaces theory studied since years in ... [more ▼]

Lie antialgebras which is a $\Z_2$-graded commutative algebra (but not associative) was introduced in 2007 by Valentin Ovsienko. This notion takes place in the superspaces theory studied since years in geometry. This algebra was discovered in the context of symplectic geometry. In a way, Lie antialgebras unify in a special meaning associative and commutative algebras with Lie algebras. Since this is quite a new subject a lot of things have to be done in the understanding of this structure. At first, I am going to explain the notion of superspaces and in particular the one of Lie superalgebras and give some important examples. After I am going to introduce the topic of Lie antialgebras and also give some examples. And finally I am going to give a links between them (Lie antilagebra and Lie superalgebra). If I have time, I will probably speak a bit about extensions and relations with 2-cocycles in the cohomology theory. That's what I am interested in for the moment. [less ▲]

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See detailLong-term biogeochemical effects of adding alkalinity into the ocean
Ilyina, Tatiana; Wolf-Gladrow, Dieter; Munhoven, Guy ULg et al

Conference (2011, June 20)

Large-scale perturbations in seawater chemistry brought about by the oceanic uptake of anthropogenic CO2 will go on long after emissions decline or stop. Several geo-engineering approaches have been ... [more ▼]

Large-scale perturbations in seawater chemistry brought about by the oceanic uptake of anthropogenic CO2 will go on long after emissions decline or stop. Several geo-engineering approaches have been suggested to reduce atmospheric CO2 concentrations and ocean acidification. One of them is to enhance weathering processes to remove atmospheric CO2. This method involves dissolving rocks (i.e. limestone, olivine) or adding strong bases (i.e. calcium hydroxide) to the upper ocean. The net effect of these two approaches is to increase ocean alkalinity, thereby increasing the oceanic capacity to take up and store anthropogenic CO2. Another effect of adding alkalinity would be to drive seawater to higher pH values and thus counteract the ongoing ocean acidification. However, whereas adding bases initially only alters alkalinity of seawater, dissolution of carbonates perturbs both, alkalinity and dissolved inorganic carbon budgets. Thus, on longer time scales, these two methods will likely have different biogeochemical effects in the ocean. Here we test enduring implications of the two approaches for the marine carbon cycle using the global ocean biogeochemical model HAMOCC which also includes marine sediments. In our model scenarios we add alkalinity in amounts proportional to fossil fuel emissions. We compare the long-term effectiveness of the two geo-engineering approaches to decrease atmospheric CO2. [less ▲]

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See detailThe use of Eco-Exergy in Oceanology: Application to Posidonia oceanica meadows
Pete, Dorothée ULg; Velimirov, Branko; Gobert, Sylvie ULg

Conference (2011, June 17)

In classic thermodynamics, exergy is defined as the useful work a system can perform when brought into equilibrium with its environment. It represents a measure of the distance from thermodynamic ... [more ▼]

In classic thermodynamics, exergy is defined as the useful work a system can perform when brought into equilibrium with its environment. It represents a measure of the distance from thermodynamic equilibrium. From that definition, some researchers (S.E. Jørgensen) have decided to apply this theory to ecosystems and called this expression of exergy “Eco-exergy”. According to this theory, a developing ecosytem trends to go far from its thermodynamic equilibrium and its exergy content trends to increase. Thus, the Laboratory of Oceanology of the University of Liege has decided to apply this quite new theory to Posidonia oceanica meadows, an endemic ecosystem of the Mediterranean coastal zone. This ecosystem is known as a good environmental quality indicator. So it was choosen to test the relevance of eco-exergy index as a quality indicator in the Mediterranean Sea. As this ecosystem is complex, this study focuses on the sedimentary compartment and the microbenthic loop (organic matter, bacteria, microphytobenthos and meiofauna). Some estimations of this eco-exergy index in the sedimentary compartment of a P. oceanica meadow are presented here. According to them, it seems that the eco-exergy index is not sensitive enough to catch effects of perturbations in this ecosystem. [less ▲]

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See detailRaman spectroscopy of dye mixtures on cotton fibres
Lepot, Laurent ULg

Conference (2011, June 17)

Raman spectroscopy is becoming a routine technique in numerous forensic labs since it is fast and non-destructive. Recent work has shown that Raman spectra of dyes depend on the excitation laser ... [more ▼]

Raman spectroscopy is becoming a routine technique in numerous forensic labs since it is fast and non-destructive. Recent work has shown that Raman spectra of dyes depend on the excitation laser wavelength used (resonance effects) and on the scattering ability of the dye molecule itself. Both factors together with fluorescence emission may affect the detection of a dye, especially within a mixture. In order to obtain a better understanding of their Raman behavior binary mixtures at various ratios have been prepared using five known dyes showing different scattering and fluorescent abilities. Their Raman investigation at 514 and 785 nm highlights the complementarity of these two resonant and non-resonant sources and the limitations of the Raman technique in the detection of both major and minor components of a dye mixture. Other investigations have been performed on binary and ternary known dye mixtures on cotton fibres by Raman spectroscopy and MSP-Vis. The combination of two laser sources leads in most cases to the detection of both or two out of three dye components. This Raman information reinforces clearly the confidence in MSP-Vis results. Indeed the contribution of the minor dye component is sometimes very small in the MSP spectrum and a visual inspection of the spectra in addition to inhomogeneous dyeing on cotton may result in difficult interpretation. For these reasons Raman spectroscopy is a very convenient technique to confirm or maybe specify the MSP results, especially for fibre types with common MSP spectra. Furthermore, MSP-Vis also showed some limitations with very light or very dark colored fibres whereas Raman spectroscopy could still discriminate between fibre types. [less ▲]

Detailed reference viewed: 37 (2 ULg)
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See detailQuand les religieuses cloîtrées sillonnent l’Europe : récits de voyage et échanges épistolaires de femmes à la croisée des cultures
Henneau, Marie-Elisabeth ULg

Conference (2011, June 17)

Après le Concile de Trente, les réguliers s’investissent à nouveaux frais dans des missions d’évangélisation et de reconquête, sillonnant le monde, sinon avec l’intention de construire une Europe moderne ... [more ▼]

Après le Concile de Trente, les réguliers s’investissent à nouveaux frais dans des missions d’évangélisation et de reconquête, sillonnant le monde, sinon avec l’intention de construire une Europe moderne, du moins avec celle de repousser au plus loin les frontières de la catholicité et d’en affirmer la suprématie. Les femmes ne sont pas en reste. Apostoliques ou contemplatives, elles participent corps et âmes à cette entreprise de Réforme et de Contre-Réforme catholiques. L’exemple des annonciades célestes est significatif de cette volonté d’aller au front, armes spirituelles à la main, mais aussi de conforter la foi de leurs coreligionnaires par l’exemple de leur engagement. Au cours de la phase d’expansion de leur ordre, ces cloîtrées ont été amenées à se déplacer et à s’adapter régulièrement à de nouveaux contextes de vie à l’intérieur de l’espace européen. Leur découverte de l’autre est abondamment commentée dans leurs échanges épistolaires et récits de vie. L’une des expériences les plus marquantes pour certaines de ces femmes a sans doute été le voyage entrepris en 1666 en vue de la fondation d’une maison en Basse-Saxe, expédition qui a entraîné ces religieuses bien au-delà de leurs territoires de prédilection. Le récit de l’aventure relaté par les voyageuses au terme de leur périple a permis à celles demeurées sur place de suivre pas à pas le progrès de leur ordre et de participer avec leurs sœurs à cette étonnante découverte d’autres modes de vie et de pensée. [less ▲]

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See detailPrivate medical practice in Benin: dynamics of a growing sector
Failon, Julie ULg

Conference (2011, June 17)

In Benin, like in many countries in sub-Saharan Africa, the setting up of structural adjustment programs forces, in the middle of eighties, the government to limit the recruitment in civil service. As ... [more ▼]

In Benin, like in many countries in sub-Saharan Africa, the setting up of structural adjustment programs forces, in the middle of eighties, the government to limit the recruitment in civil service. As they were systematically hired by the State, most of health professionals are unemployed from 1986. Henceforth, private health sector grow progressively, without any legislation, through the development of many formal and informal private surgeries and clinics. The article will focus mainly on the development of private profit-making medical practice in Benin. It will be based on three empirical researches about medical profession in this country, from March 2009 to April 2011. In this paper, we will refer to qualitative interviews on the one hand with actors from both private and public medical structures, mainly doctors, paramedical staffs and patients, and one the other hand, with representatives of professional organizations, public policies in Ministry of Health and international organizations. First, the article will briefly describe the historical development of private medical practice in Benin, and consider governmental responses to this process. Thus we will address to the belated drawing up of a regulatory framework and the lack of control by the profession consequences, notably in terms of qualification, ethics and quality of health care. We will also examine recent reactions aimed at remedying to these different pitfalls. In this context, the paper will interest secondly in new entanglements between the public medical sector and the private medical structures emerging at local level. We will examine doctors’ practices and strategies, with only private practitioners and with doctors working in both private and public sectors. Finally, the article will give attention to how these private medical surgeries and clinics and the access conditions to these structures are perceived by health providers and patients. In this part of the paper, we will also address to tactics worked by patients regarding the different medical facilities. As a conclusion, we will wonder whether this medical private sector would contribute to reproduce some mechanisms of inequality in health sector. [less ▲]

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See detailA Two Degree of Freedom Kinematic Model for Predicting the Deformations of Deep Beams
Mihaylov, Boyan ULg; Bentz, Evan; Collins, Michael

Conference (2011, June 17)

In modern construction, it is not unusual to require a short span member to carry a very large load such as with a transfer girder. These members generally have high shear strengths with strut-and-tie ... [more ▼]

In modern construction, it is not unusual to require a short span member to carry a very large load such as with a transfer girder. These members generally have high shear strengths with strut-and-tie models being able to predict these strengths generally in a conservative manner. For serviceability checks, cracked stiffness estimates, and seismic design, however, it is also important to be able to predict the deformations of the member accurately. In this paper a set of eight large and heavily instrumented reinforced concrete deep beams subjected to monotonic or cyclic loading are summarized. The displacements of these tests are explained in detail with particular attention paid to the development of deformations over the full load history. From these deformations, the paper notes that a simple 2 degree of freedom (DOF) kinematic model can be developed to predict the entire displacement field for a beam after diagonal cracking has occurred. These two degrees of freedom are the average longitudinal strain in the flexural reinforcement, and the vertical distortion of the critical loading zone near the applied load. When the results of the measured displacements of the beam tests are compared to the pattern of deformations from the 2 DOF model, excellent agreement is obtained. In addition, it is shown that the width of the main diagonal crack can also be explained well using the same 2 DOF model once these parameters are known. A forthcoming paper will explain how these parameters themselves can be predicted. [less ▲]

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See detailDéfaillance neurologique au cours de l'insuffisance hépatique aigüe
DETRY, Olivier ULg

Conference (2011, June 16)

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See detailEvolving trends in Latin American regimes of science, technology and innovation: the politics of the “GM soya model” in Argentina
Delvenne, Pierre ULg

Conference (2011, June 16)

Our interest is to understand the challenges to modern (national) science and innovation regimes under conditions of globalization and “multiple modernities” (Eisenstadt 2000). Different scholarly ... [more ▼]

Our interest is to understand the challenges to modern (national) science and innovation regimes under conditions of globalization and “multiple modernities” (Eisenstadt 2000). Different scholarly attention has been paid to existing institutions that may no longer be adequate to address those challenges. This may be because modern institutions are pressured for a greater reflexive opening up of their structures (Beck and Lau 2005) or because the modern world-system is facing severe turbulences that would ultimately lead to a time of structural dissolution (Wallerstein 2005). This renders interesting to trace the responses to these challenges, and we suggest to do it in the field of science, technology and society, one where we can make a contribution. Unlike many studies mainly focusing on European models and regimes, our ongoing multi-level comparative research takes Latin American countries as an entrance point to finding responses that are different from those occuring in European countries. Latin American countries are interesting to study in this respect because institutions of science and technology have not been set up in the same way as in Europe and the governance patterns have been different. Our presentation is based on one country, Argentina, and focuses on one important sector: biotechnology in agriculture. Argentina is taken as a central case study because in addition of being today the second largest exportator of GM crops (behind the US and before Brasil), it has been the first country in Latin America to establish a professional regulatory framework in the early 1990s, looking at ecological, health and commercial aspects. GM soya crops is specifically analysed because of its importance — GM soya represents 60% of the cultivated areas — and its controversial aspect : the « GM soya model » is presented at the same time as an elixir for agro-industrial ills and as a techno-economic network increasing the benefits of the global North while dramatically affecting public health and the environment in Argentina. We suggest to diagnose developments and perceptions of issues related to health, economy, ecological diversity, fertility of soils, regulation and intellectual property. Our methodology favours qualitative data collection (individual interviews with key actors of science and innovation) and analysis, while using quantitative data when available and relevant. [less ▲]

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See detailAvis des bénévoles impliqués dans le sport belge francophone au sujet de leur rôle. Etude pilote.
Robyns de Schneidauer, Jérôme ULg; Colina-Valdor, Xavier; Cloes, Marc ULg

Conference (2011, June 16)

Le sport représente la plus grande activité sociale en Europe. L'activité des 700.000 clubs sportifs des pays membres de l'Union européenne est en grande partie basée sur le travail bénévole de ses ... [more ▼]

Le sport représente la plus grande activité sociale en Europe. L'activité des 700.000 clubs sportifs des pays membres de l'Union européenne est en grande partie basée sur le travail bénévole de ses membres. Le bénévolat est reconnu comme l’une des caractéristiques spécifiques et essentielles des structures sportives européennes. Il faut souligner ici que le monde sportif est le plus grand utilisateur de travailleurs volontaires avec 35 % du bénévolat total. L’engagement et la qualité de travail des bénévoles sont souvent les clés de la réussite de tout club sportif. Ce qui motive une personne à être bénévole est complexe (Esmond,1997). Cependant, comprendre ces motivations profondes est suggéré par de nombreux auteurs comme étant un facteur primordial dans le recrutement, la sélection, le placement et la rétention des bénévoles au sein d’une organisation (Clary, Snyder & Ridge,1992 ; Cnaan & Goldberg-Glen,1991 ; Esmond,2001 ; McCurley & Lynch,1994 ; Vineyard,2001). Identifier les motivations de chaque bénévole permettrait au dirigeant de mieux cibler les tâches propres à chacun, assurant ainsi une plus grande satisfaction et un investissement plus long dans la durée (Slaughter,2002). Notre étude pilote vise, d’une part, à faire une mise au point sur les raisons principales qui poussent les bénévoles à s’engager dans ce type d’activité en Communauté Wallonie-Bruxelles et, d’autre part, de mieux cerner la propre opinion que les bénévoles ont de leur monde. Notre objectif final consiste à jeter les bases nécessaires pour effectuer une enquête à grande échelle. Un total de 224 questionnaires orientés sur le vécu de chaque bénévole a ainsi été collecté. Les réponses furent encodées sous formes de variables binaires, continues ou catégorielles. L’étude met en évidence 3 principales motivations au bénévolat sportif : (1) aider les autres (accord très élevé, 94% de réponses positives), (2) partager sa passion pour le sport (accord très élevé, 85% de réponses positives) et (3) se socialiser grâce au contact avec d’autres personnes (accord élevé, 71% de réponses positives). A partir de nos résultats, chaque sujet consacrerait en moyenne 8,8h par semaine au bénévolat. Au vu des études menées dans le monde du bénévolat et des résultats de notre étude pilote, il semblerait opportun de s’intéresser encore davantage aux bénévoles et à leurs difficultés, de comprendre la diversité des contextes dans lesquels ils évoluent. Nous proposons, enfin, de les impliquer dans le développement de stratégies susceptibles de garantir la pérennité de leur action et de l’idéal qui les anime. [less ▲]

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See detailLes besoins en mathématique des futurs professeurs du secondaire
Schneider-Gilot, Marguerite ULg

Conference (2011, June 15)

Detailed reference viewed: 14 (1 ULg)
See detailInvestigation of the physics of wind interactions in colliding-wind massive binaries through XMS high resolution X-ray spectroscopy
De Becker, Michaël ULg

Conference (2011, June 14)

Binary systems made of two massive stars offer the opportunity to investigate the physics of quite extreme stellar environments. The powerful stellar winds collide, producing so-called wind interaction ... [more ▼]

Binary systems made of two massive stars offer the opportunity to investigate the physics of quite extreme stellar environments. The powerful stellar winds collide, producing so-called wind interaction regions, and the shocked gas is heated up to temperatures that can reach values as high as several tens of MK, leading to the production of copious amounts of thermal X-rays. The properties of the X-ray spectrum of such systems are intimately related to the orbitally modulated physical conditions in the wind interaction region. The study of the hydrodynamics of the colliding-wind phenomenon is a crucial issue in the sense that it constitutes the basement for the study of higher level physical processes at work in these systems, such as particle acceleration or even dust production. High-resolution X-ray spectroscopy with ATHENA/XMS is undoubtedly expected to be the most powerful tool to probe the physics of such environments over the next two decades, allowing a detailed confrontation to state-of-the-art theoretical models aiming at simulating the complex physics of colliding-wind massive binaries (CWBs). [less ▲]

Detailed reference viewed: 14 (1 ULg)
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See detailA Boolean network approach to developmental engineering
Kerkhofs, Johan ULg; Roberst, Scott J; Luyten, Frank P et al

Conference (2011, June 13)

Detailed reference viewed: 13 (0 ULg)
See detailTurbiditic sedimentary record in the different basins of the Sea of Marmara
Hubert, Aurelia ULg; Drab, Laureen; Schmidt, Sabine et al

Conference (2011, June 13)

Detailed reference viewed: 34 (8 ULg)
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See detailSoil-plants relations diversity in extreme ecosystems and implications for restoration: the case of the cupriferous vegetation, in Katanga, D.R. Congo
Seleck, Maxime ULg; Lebrun, Julie ULg; Piqueray, Julien ULg et al

Conference (2011, June 13)

Katangan copper and cobalt hills in the D. R. Congo are isolated ecosystems on highly toxics substrates (>10.000 ppm Cu, with strongly marked gradients). As a result, those outcrops host singular vegetal ... [more ▼]

Katangan copper and cobalt hills in the D. R. Congo are isolated ecosystems on highly toxics substrates (>10.000 ppm Cu, with strongly marked gradients). As a result, those outcrops host singular vegetal communities – with a diversity of specialized metallophytes species – related to soil metals content. Recent resumption of mining activities in the area threatens those ecosystems. To allow the restoration of those communities a fine understanding of the relationship maintained with the edaphic factors is required, as well as a characterization of the intra and inter sites variation. Three outcrops have been studied on the basis of a systematic grid, following the a priori trace elements gradient. In 1m² quadrats, a composite soil sample (0-15 cm depth) was taken and the cover (%) of each species of vascular plants was recorded. Soils were analyzed for pH, C, N, and bioavailables Cu, Co, Zn, Mn, Fe, K, Mg, Ca and P. The cluster analysis and Canonical Correspondence Analysis show that different sites present different soil conditions and vegetation. Concentrations in Cu are an important explicative factor of the flora’s variation but gradients in others edaphic parameters (pH, Mg, Mn, K, Ca) appear to be essential. However, parameters explaining the diversity of communities vary from one site to another indicating a great diversity of those ecosystems and the need to develop restoration strategies relevant for each site. [less ▲]

Detailed reference viewed: 55 (11 ULg)
See detailChoix des biomatériaux dans la régénération osseuse alvéolaire.
LAMBERT, France ULg

Conference (2011, June 11)

L’utilisation de biomatériaux dans la régénération osseuse alvéolaire est aujourd’hui incontournable au vu des évidences scientifiques et de la morbidité liée aux techniques de greffes osseuses autologues ... [more ▼]

L’utilisation de biomatériaux dans la régénération osseuse alvéolaire est aujourd’hui incontournable au vu des évidences scientifiques et de la morbidité liée aux techniques de greffes osseuses autologues. Cependant, une multitude de biomatériaux, ayant des caractéristiques physico-chimiques et des origines différentes, sont disponibles sur le marché. Leur influence sur l’ostéogénèse, ainsi que leur comportement à court et long terme sont souvent mal connus des praticiens. Le but de cet exposé est de clarifier les propriétés des biomatériaux les plus utilisés en médecine dentaire, ainsi que de déterminer leurs indications et leurs limitations cliniques. [less ▲]

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See detailLa libération sans la révolution. Les avatars de la contre-culture en France
Denis, Benoît ULg

Conference (2011, June 10)

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See detailMechanism of Nicotinic acid-induced Flushing
Hanson, Julien ULg

Conference (2011, June 10)

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See detailLe musée de ville, une catégorie muséale en quête de définition
Postula, Jean-Louis ULg

Conference (2011, June 10)

Detailed reference viewed: 41 (2 ULg)
See detailLes conseillers à l'emploi : tensions de l'intermédiation
Orianne, Jean-François ULg

Conference (2011, June 10)

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See detailCan the Electoral Threshold Explain – some part of – Electoral Volatility in Belgium?
Reuchamps, Min ULg; Onclin, François ULg

Conference (2011, June 10)

Recent election results showed an increased electoral volatility in Belgium. In the mean time, the very stable Belgian electoral system experienced a – quite – important change with the implementation of ... [more ▼]

Recent election results showed an increased electoral volatility in Belgium. In the mean time, the very stable Belgian electoral system experienced a – quite – important change with the implementation of a five per cent electoral threshold in both federal and regional elections. Therefore, can the introduction of this legal threshold explain – some part of – the increased electoral volatility in Belgium? The last five general elections – three federal (2003, 2007 and 2010) and two regional (2004 and 2009) offer a fertile ground for such an investigation. More specifically, in order to provide an answer to this question, we look at the psychological effect, as coined by Duverger and since then much refined. In addition to the existence of a mechanical effect, the electoral system may have a psychological impact on both voters and parties. Indeed, voters and party elites may adapt their behaviour to the implementation of the electoral threshold and this adaptation could explain electoral volatility. To test this hypothesis, we use several formulas in order to measure the psychological impacts of the five per cent threshold on Belgian voters, on the one hand, and on Belgian political parties, on the other hand. Our results show the impact of the legal threshold should be nuanced. While there was in fact an impact – both mechanical and psychological – on parties, it did not prevent the emergence of new political parties – which may explain some part of the electoral volatility. As of the voters, when they are aware of the threshold, they tend not think of the legal electoral threshold in the polling booths, so the main explanations for electoral volatility should be sought elsewhere. [less ▲]

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See detailEnquête sur l’innovation en Province de Liège : premiers résultats
Artige, Lionel ULg; Dubois, David

Conference (2011, June 09)

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See detailLes capacités européennes
Dumoulin, André ULg

Conference (2011, June 09)

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See detailRomain Gary, compagnon de l'aliénation
Sindaco, Sarah ULg

Conference (2011, June 09)

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See detailNEMA NU4-2008 performance evaluation for the microPET Focus 120 and iodine-124
Taleb, Dounia ULg

Conference (2011, June 09)

Detailed reference viewed: 20 (4 ULg)
See detailparticipation au débat Monsieur Gagne-pain et Madame Gagne-petit
Gavray, Claire ULg

Conference (2011, June 09)

comment les indicateurs économiques retenus tronquent la réalité concernant les gains professionnels et les risques de pauvreté des hommes et des femmes ?discussion technique et de fond

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See detailTax Evasion, Welfare Fraud, and ”The Broken Windows” Effect: An Experiment in Belgium, France and the Netherlands
Lefebvre, Mathieu ULg

Conference (2011, June 09)

In a series of experiments conducted in Belgium (Wallonia and Flanders), France and the Netherlands, we compare behavior regarding tax evasion and welfare dodging, with and without information about ... [more ▼]

In a series of experiments conducted in Belgium (Wallonia and Flanders), France and the Netherlands, we compare behavior regarding tax evasion and welfare dodging, with and without information about others’ behavior. Subjects have to decide between a ‘registered’ income, the realization of which will be known to the tax authority for sure, and an ‘unregistered’ income that will only be known with some probability. This unregistered income comes from self-employment in the Tax treatment and from black labor supplementing some unemployment compensation in the Welfare treatment. Subjects have then to decide on whether reporting their income or not, knowing the risk of detection. The results show that (i) individuals evade more in the Welfare treatment than in the Tax treatment; (ii) many subjects choose an option that allows for tax evasion or welfare fraud but report their income honestly anyway; (iii) examples of low compliance tend to increase tax evasion while examples of high compliance exert no influence; (iv) tax evasion is more frequent in France and the Netherlands; Walloons evade taxes less than the Flemish. There is no cross-country difference in welfare dodging. [less ▲]

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See detail« Ce qu’il est con ce Baader ! » – Sartre à Stammheim
Cormann, Grégory ULg; Hamers, Jérémy ULg

Conference (2011, June 09)

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See detail20 ans de formation ! et demain ?
Morant, Michel ULg

Conference (2011, June 08)

La présentation met en évidence les besoins nouveaux dans les compétences requises pour un gestionnaire de transfert de technologie ou agent de valorisation

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See detailTraitement d'incidents critiques dans le cadre de séminaires de pratiques réflexives organisés en formation initiale des enseignants de langues modernes à l'Université de Liège
Simons, Germain ULg

Conference (2011, June 07)

Cette communication présente un dispositif particulier des séminaires de pratiques réflexives organisés dans le cadre du Master à finalité didactique/de l'AESS en langues modernes à l'ULg, en l'occurrence ... [more ▼]

Cette communication présente un dispositif particulier des séminaires de pratiques réflexives organisés dans le cadre du Master à finalité didactique/de l'AESS en langues modernes à l'ULg, en l'occurrence, le traitement d'incidents critiques vécus en stages d'enseignement. Après avoir proposé une définition opérationnelle du terme "incident critique" (IC), l'auteur décrit et commente les grandes étapes de traitement des IC, puis fournit quelques éléments d'évaluation de ce volet particulier du dispositif de formation. Enfin, la communication se clôture avec la formulation de quatre questions ouvertes relatives aux pratiques réflexives. [less ▲]

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See detail"Coaching" assisté par la vidéo dans le cadre du CAPAES en langues modernes à l'Université de Liège
Simons, Germain ULg

Conference (2011, June 07)

Cette communication présente un dispositif de formation proposé dans le cadre du C.A.P.A.E.S. en langues modernes organisé par l'Université de Liège (Belgique). Plus précisément, elle analyse le soutien ... [more ▼]

Cette communication présente un dispositif de formation proposé dans le cadre du C.A.P.A.E.S. en langues modernes organisé par l'Université de Liège (Belgique). Plus précisément, elle analyse le soutien individuel que le formateur apporte à chaque étudiant ("coaching") dans la conception, la mise en pratique et l'évaluation d'une séquence didactique expérimentale. Une des leçons de la séquence est intégralement filmée et fait l'objet d'un séminaire d'autocopie avec l'étudiant. Les extraits vidéo sont également utilisés pour illustrer la séance de partage d'expériences en fin d'année. Enfin, une fois didactisées, les séquences vidéo servent à illustrer le cours de didactique professionnelle et à l'ancrer davantage dans la pratique professionnelle des étudiants-enseignants. [less ▲]

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See detailModelo de componentes para análise de ligações de madeira com ligadores metálicos
Cachim, Paulo; Franssen, Jean-Marc ULg

Conference (2011, June 07)

Connections are key elements in any structure because the knowledge of their behaviour is fundamental to an appropriate structural modelling since this behaviour can influence the distribution of efforts ... [more ▼]

Connections are key elements in any structure because the knowledge of their behaviour is fundamental to an appropriate structural modelling since this behaviour can influence the distribution of efforts in different structural elements. In the particular case of wood structures, connections are usually considered as completely rigid or hinged, but their actual behaviour is intermediate between these two extreme limits, depending on the geometry of the connection and the type of connector used. For the design of these connections, the methodology proposed by Eurocode 5 is based on plastic limit analysis which allows the determination of load strength of the connection but not the determination of its stiffness. For the determination of stiffness, Eurocode 5 presents just a very simple expression that depends only on the density of the wood and the diameter of connector to characterize the force-displacement behaviour, disregarding for this purpose the geometry of the connection or the angle of force in relation to the grain. The objective of this paper is to present a component model that allows the characterization of the behaviour of dowel type connections. The results obtained with the model were calibrated with experimental results obtained in the litterature. [less ▲]

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See detailMALDI mass spectrometry imaging of secreted lipopeptides in a bacterial biofilm colonizing plant roots
Debois, Delphine ULg; Jourdan, Emmanuel ULg; Ongena, Marc ULg et al

Conference (2011, June 06)

During the aggression of a plant by a pathogen, different immune reactions may occur. "Induced Systemic Resistance” (ISR) is triggered by the specific interaction between plant and non-pathogenic ... [more ▼]

During the aggression of a plant by a pathogen, different immune reactions may occur. "Induced Systemic Resistance” (ISR) is triggered by the specific interaction between plant and non-pathogenic microorganism. The first step (of three) consists in the perception by plant cells of elicitors produced by the inducing agents that initiates the phenomenon. One class of known elicitors is antibiotics including surfactin- and fengycin-type lipopeptides. Recent studies in biology, genetics or biochemistry allowed a better understanding of the interactions between plants and microorganism but few has been done at the molecular level. MALDI MS imaging has been used to study the nature of the secreted lipopeptides, their relative quantity and their distribution in the root’s environment. Disinfected tomato seeds were first incubated at 28°C in sterile conditions for germination. Germinated seeds were then treated with freshly-grown cells of Bacillus amyloliquefaciens S499 and placed in Petri dish on ITO glass slide recovered with a thin layer of plant nutritive solution (Hoagland) containing 1,75% of agar. Petri dishes were finally incubated vertically in phytotron during 10 days (28°C, photoperiod 16h). For MALDI imaging experiments, the ITO slide was removed from the agar and dried in a dessiccator under vacuum. The matrix solution (9-aminoacridine) was applied with an ImagePrep automated sprayer (Bruker Daltonics). An UltraFlex II TOF/TOF mass spectrometer was used to record molecular cartographies. The average mass spectra recorded around the tomato root (2-3 mm on both sides of the root) showed that lipopeptides were major compounds detected on the agar. Only the surfactins have been detected when working with the S499 strain. The most abundant surfactins were those with longer fatty acyl chain lengths, such as C14- and C15-homologues. Such a surfactin signature is interesting since homologues with the longest acyl chains are also the more active biologically. The distribution of surfactins showed a gradient representing the diffusion of the molecules during the root growth. The more the fatty acyl chain is long, the more the surfactin is detected near the root. Other compounds detected during the analysis showed a clear anti-colocalization with the surfactins. Future work will be focused on the influence of the plant species (tobacco, salad, Arabidopsis thaliana) on the secretion of lipopeptides (type, concentration…) and the influence of the strain of Bacillus amyloliquefaciens regarding its ability to selectively produce specific lipopeptide families (overproducing or repressed mutants). This MS imaging technique thus appears to be a very powerful method to study in situ production of bioactive lipopeptides by bacteria developing on roots. This is crucial for a better understanding of the molecular dialogue governing perception of beneficial Bacillus strains by the host plant. This study provides a first analysis over a long root section of lipopeptides secreted by a bacterial biofilm colonizing plant. [less ▲]

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See detail20 ans de valorisation dans l'Espace Wallonie-bruxelles
Morant, Michel ULg

Conference (2011, June 06)

La présentation brosse 2à années d'évolution des universités en Wallonie en matière de 3e mission, et en particulier de la valorisation économique de la recherche

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See detailA shell fracture framework based on a full discontinuous Galerkin formulation combined with an extrinsic cohesive law
Becker, Gauthier ULg; Noels, Ludovic ULg

Conference (2011, June 06)

The cohesive method can be combined easily with Finite Element method to simulate a fracture problem which can contains fracture initiation and propagation. Nevertheless, the insertion of cohesive ... [more ▼]

The cohesive method can be combined easily with Finite Element method to simulate a fracture problem which can contains fracture initiation and propagation. Nevertheless, the insertion of cohesive elements is not straightforward. Indeed, the two classical approaches suffer from severe limitations. On one hand, in the intrinsic approach, as the cohesive element is inserted at the beginning, this element has to model the continuum stage of deformation before fracture. This is ensured by an initial slope in the cohesive law which leads to a stiffness modification and to an alteration of propagation of wave. On the other hand, the introduction of the cohesive element during the simulation in extrinsic approach requests a dynamic modification of mesh. This operation is very difficult to implement especially in the case of a parallel implementation which is almost mandatory due to the very important number of degrees of freedom inherent to a fine mesh used to track the crack path. A solution to these limitations, pioneered by J. Mergheim and R. Radovitzky is to recourse to a discontinuous Galerkin formulation. Indeed this one used discontinuous test functions and integration at the interface of elements to discretize a structure with discontinuous elements. The integration on the boundary of elements allows ensuring weakly the continuity of displacements in a stable and consistent manner. As interface elements are present they can be easily substituted by cohesive elements when a fracture criterion is reached. The interest of the method has been recently proved by R. Radovitzky etal. for 3D elements and by the authors for Euler-Bernoulli beams. An extension of the formulation to Kirchhoff-Love shell is presented here. A novel extrinsic cohesive law is developed to model a through the thickness fracture. In fact, as in thin bodies formulation the thickness is not “discretized” this operation is not straightforward. Indeed, as the fracture occurs only in tension, in a pure bending case the position of neutral axis has to be move to propagate the fracture. To avoid this complicated step, it is suggested to integrate on the thickness the cohesive law which is then applies on resultant efforts. The coupling between the openings in displacement and rotation is performed in a way which guarantees a proper release of energy for any loading. Furthermore, the combination between fracture modes I and II is realized as suggested by M. Ortiz etal. Some numerical quasi-static and dynamic benchmarks are simulated to show the interest and the good performance of the presented framework. [less ▲]

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See detailOrdinary Citizens' Experiences of Law as Process: The Case of Employment Discriminations in Belgium
Lejeune, Aude ULg; Orianne, Jean-François ULg

Conference (2011, June 04)

Through their different encounters with union, court, and government equality agency lawyers, workers report diverse understandings of her personal experience of injustice in the workplace. This paper ... [more ▼]

Through their different encounters with union, court, and government equality agency lawyers, workers report diverse understandings of her personal experience of injustice in the workplace. This paper examines workers’ experiences of discrimination and the role lawyers play in litigating these issues in Belgium. Bringing together the legal and rights consciousness studies and the sociology of mediation and tracking different stages in the construction of discrimination cases, from the moment when a future litigant describes an event as an injustice to the moment when the judge recognizes a discriminatory behavior (or conversely, dismisses a case), we suggest several possible empirical explanations of the way in which lawyers’ interpretation of a case directly affects workers’ rights consciousness. Because we refer to US socio-legal studies, this paper also calls into question how to import these studies to assist in analyzing legal mobilizations and legal consciousness in continental Europe. [less ▲]

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See detailLa littérature à l'ombre
Saint-Amand, Denis ULg

Conference (2011, June 03)

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See detailBiogeochemistry of the Congo river: Preliminary data
Darchambeau, François ULg; Borges, Alberto ULg; Wabakanghanzi, José Nlandu et al

Conference (2011, June 03)

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See detailL’étrange figement des séquences polylexicales antonymes
Steffens, Marie ULg

Conference (2011, June 01)

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See detailAuroral emissions of Europa
Grodent, Denis ULg

Conference (2011, June 01)

Detailed reference viewed: 9 (1 ULg)
See detailQuelques cas de figement dans le volume 17 de l'Atlas linguistique de la Wallonie
Baiwir, Esther ULg

Conference (2011, June 01)

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See detailAn efficient biphasic synthesis of polymer-grafted reduced graphite oxide based nanocomposites
Vuluga, Daniela ULg; Thomassin, Jean-Michel ULg; Molenberg, Isabel et al

Conference (2011, June 01)

Detailed reference viewed: 64 (9 ULg)
See detailTowards the understanding of the structure and assembly of the E. coli septum
Derouaux, Adeline ULg; Vollmer, Waldemar

Conference (2011, June)

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See detailAlternative ways of financing social insurance in Latin America
Jousten, Alain ULg; Gillingham, Robert

Conference (2011, June)

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See detailSustainability of tropical forest biodiversity and services under climate and human pressure (BIOSERF): tracking the regeneration of human-used plants through dispersal by the animal community
Huynen, Marie-Claude ULg; Beudels, R.; Baert, A. et al

Conference (2011, June)

The objective of the BIOSERF project is to assess the sustainability of a tropical humid forest ecosystem and the local human communities in southern Congo under future climate, demographic and societal ... [more ▼]

The objective of the BIOSERF project is to assess the sustainability of a tropical humid forest ecosystem and the local human communities in southern Congo under future climate, demographic and societal changes. The project focuses on the interactions between flora, fauna and local human population to understand the processes affecting biodiversity and ecosystem services in tropical humid areas, with the objective of setting up mechanisms to preserve local biodiversity. In close collaboration with a local NGO, it will use a dynamic vegetation model (CARAIB) which will be integrated within an agent-based model, to analyze the impacts of different ecosystem services in a tropical humid area, e.g. the production of medicinal plants, of wood and other forest products, or the services provided by the building of natural reserves. The vegetation model will be upgraded to take into account the process of regeneration of several plant species, selected for their use by local human populations, through a quantitative and qualitative description of plant dispersal by the animal community. To do so, a selection of five tree species frequently or traditionally used will be made based on the results of a sociological survey. Observations (direct or through camera trapping) of a sample of the selected species will allow identifying the main dispersers and the pattern of seed shadow they generate. Integrated into the CARAIB model, these results will allow figuring how the evolution of the dispersal community under pressures of climate change, habitat loss and hunting, but also potentially placed under managed protection could affect the services available to the human community. [less ▲]

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See detailMechanochemical Study of a Single Polypeptide Molecule: Force-Induced Conformational Transition
Willet, Nicolas ULg; Hinterdorfer, Peter; Lecommandoux, Sébastien et al

Conference (2011, June)

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See detailImpact of the Use of Crumb Rubber Modified Binder on Tire/Road Noise Generation
Luong, Jeanne ULg; Bueno, M.; Teran, F. et al

Conference (2011, June)

The recycling of waste material produced by human activity is one of the challenges of our generation. One of the most serious environmental problems of the recent years is mass production of tire and the ... [more ▼]

The recycling of waste material produced by human activity is one of the challenges of our generation. One of the most serious environmental problems of the recent years is mass production of tire and the di􏰟culty of disposing of them. The material and energetic valorization of the wasted tires is possible through the extension of 􏰔green roads􏰕. The incorporation of crumb rubber from wasted tires in bi- tuminous binders allows the design of new asphalt pavements with a higher viscosity. A preliminary study to determine the impact of the use of crumb rubber modi􏰝ed bituminous binder in the sound generation level for a thin layer type BBTM11A, has been carried out by the LA2IC. These results are compared with sound level from a BBTM11A with a conventional binder. This work presents the acoustical characterization performed on the regional road CM-3102 in Ciudad Real (Castilla- La Mancha), based on the close proximity methodology (Tiresonic Mk4-LA2IC ). In addition, mea- surements of super􏰝cial macrotexture pro􏰝le have been realized with the LaserDynamicPG-LA2IC to study the relationship with close proximity road noise. Furthermore, sound absorption measurements of BBTM11A compacted samples have been analyzed to understand the mechanisms involved in the sound generation. The results show that addition of crumb rubber by the wet process leads, in this case (20% crumb rubber content), to a decrease in the sound level emitted by the interaction between tire and road surface, at low frequency by mu􏰠ing the vibrations and by sounf absorption at high frequency. [less ▲]

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See detailInvestigation of Ion Mobility coupled with mass spectrometry (IMMS) for the screening of pesticide residues in food
Goscinny, Séverine ULg; Touilloux, Romain; Joly, Laure et al

Conference (2011, June)

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See detailANALYSING VIDEOS AND STILL IMAGES OF VULNERABLE MARINE ECOSYSTEMS IN THE DEEP-SEA: A PRACTICAL APPLICATION USING COVER
Guillaumont, Brigitte; Carré, Cyril ULg; van den Beld, Inge et al

Conference (2011, June)

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See detailGenetic interactions shaping the inflorescence of tomato
Périlleux, Claire ULg

Conference (2011, June)

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See detailComoment Risk and Stock Returns
Lambert, Marie ULg; Hübner, Georges ULg

Conference (2011, June)

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See detailManagement éthique, responsabilité sociale en entreprise et leadership: quelques questions
Robert, Jocelyne ULg

Conference (2011, June)

The question is the links between leadership and corporate social responsibility. Can some types of leadership improve some type of social responsibility? Are moral leadership and ethical leadership one ... [more ▼]

The question is the links between leadership and corporate social responsibility. Can some types of leadership improve some type of social responsibility? Are moral leadership and ethical leadership one solution? Today, in the international economic context, it is important to think about the kind of leadership for the company. To understand this links, it is important to understand the relation between the different stakeholders, the importance of the corporate culture and of the corporate identity. How build this identity? Which levels? One individual level and one institutional level exists. We will try to understand the contradictions and the resistances for more social responsibility and will present some cases. [less ▲]

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See detailControl and Voting Power in Complex Shareholding Networks
Crama, Yves ULg; Leruth, Luc ULg; Su Wang

Conference (2011, June)

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See detailMETHODOLOGY OF ANNOTATING VIDEOS AND STILL IMAGES AND DEVELOPMENT OF THE SOFTWARE COVER
Guillaumont, Brigitte; Carré, Cyril ULg; van den Beld, Inge et al

Conference (2011, June)

Detailed reference viewed: 115 (10 ULg)
See detailAn Overview Of Methodology For Predicting Activities And Functionalities Of A Wide Range Of Carbohydrate- Based Surfactants From Their Fundamental Properties
Razafindralambo, Hary ULg

Conference (2011, June)

Introduction and Background: Carbohydrate-based surfactants (CBS) are, today, among the most attractive amphiphilic compounds owing to their high potentiality for a large product concept. The main ... [more ▼]

Introduction and Background: Carbohydrate-based surfactants (CBS) are, today, among the most attractive amphiphilic compounds owing to their high potentiality for a large product concept. The main fundamental reasons are the abundance of their precursors from renewable resources, the excellent environmental compatibility, and the quasi-unlimited availability of their molecular structure and geometry. Based on the latter aspect, CBS would be expected to generate a wide range of functionalities and activities for food and non-food applications. All kinds of amphiphilic compounds including small surfactants, bolaforms, geminis, oligomeric, and polymeric molecules with a single or a multiple hydrophobic tails can be designed by synthetic routes thanks to a large number of reactive chemical groups in their basic structure. Consequently, various methodologies are required, and could be used in complementary for identifying all of their potentiality for further development. Methodology: The methodology is based on the characterization in the laboratory scale, i.e. using only small amounts of sample, of CBS properties at fluid and solid interfaces, in bulk liquid phases, and at the solid state with simplified models. Results and Discussion: In this communication, an overview of functionality and activity-predicting methods for a wide range of CBS structures varying in head polar groups, hydrophobic tail and number, and linkers will be presented and discussed. Performances and complementarities of different approaches, methodologies, and techniques will be emphasized. These include sample preparation and analysis procedures, interfacial-characterizing instruments, mainly tensiometers and Langmuir balances used both in dynamic and (quasi)-static modes, particle size and electrical charge analyser, and (micro)calorimeters using differential scanning, isothermal titration, and thermogravimetry methods. Conclusion: The knowledge of these basic properties is helpful for predicting their main activities and functionalities like their aptitude for forming and stabilizing colloidal systems, and for developing biological activities. This is also necessary for the rational design of CBS amphiphilic structure regarding to specific properties. The same approach can also be applied for other required features as the compound stability, toxicity, and biodegradability. [less ▲]

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See detailINFLUENCE OF SOLUBLE POLYSACCHARIDE ON THE ADHERENCE OF PARTICULATE SOILS
Toure, Yetioman ULg; Rouxhet, G. Paul; Dupont-Gillain, C. Christine et al

Conference (2011, June)

The removal of particulate soils from solid surfaces is the key process of cleaning many industrial devices, such as heat exchangers and spray dryers (food and pharmaceutical sector), and may be ... [more ▼]

The removal of particulate soils from solid surfaces is the key process of cleaning many industrial devices, such as heat exchangers and spray dryers (food and pharmaceutical sector), and may be influenced by the presence of solutes, in particular of macromolecules. The present study deals with the influence of soluble polysaccharide on the adherence of particulate fouling of open surfaces and on subsequent cleaning. Model surfaces differing by hydrophobicity (glass and polystyrene) were soiled with a suspension of quartz particles, taken as a model of hard hydrophilic soil. Dextran was chosen as a model of soluble polysaccharide. The surfaces were soiled with or without previous conditioning with the polysaccharide solution (80mg/l). The quartz particles suspension was prepared in three ways: (i) suspension in a polysaccharide solution (80mg/l), (ii) same as (i) and subsequent washing three times, (iii) suspension in water. The surfaces were soiled by spraying the suspension and dried for 30min before cleaning treatment with a water flow in a radial flow chamber. The aggregates observed after soiling differed considerably between glass and polystyrene, whether the surface and/or the quartz particles are conditioned with dextran. Conditioning polystyrene with dextran increased slightly the adherence of quartz particles, while the opposite was observed when conditioning glass with dextran, whatever the mode of quartz particles conditioning. The effect of conditioning quartz particles with dextran at the concentration used was not significant. [less ▲]

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See detailTracer application at different scales for wastewater treatment: from bacteria to industrial plant
Potier, Olivier; Louvet, Jean-Noël ULg; Le Moullec, Yann et al

Conference (2011, June)

Detailed reference viewed: 26 (4 ULg)
See detailEmotion and sleep interact to enhance the perceptual discrimination of ambiguous faces. Abstract book of the conference
Sterpenich, Virginie; Piguet, Camille; Desseilles, Martin ULg et al

Conference (2011, June)

Detailed reference viewed: 4 (0 ULg)
See detailOverview of the S-adic conjecture
Leroy, Julien ULg

Conference (2011, June)

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See detailImpact of population history on Viola calaminaria conservation, an endemic species of calamine sites
Bizoux, Jean-Philippe ULg; Mahy, Grégory ULg

Conference (2011, June)

The zinc violet, Viola calaminaria is a threatened species, endemic to calamine sites in Belgium and West Germany. Since the end of 19th century, the V. calaminaria habitat network have exhibited a huge ... [more ▼]

The zinc violet, Viola calaminaria is a threatened species, endemic to calamine sites in Belgium and West Germany. Since the end of 19th century, the V. calaminaria habitat network have exhibited a huge dynamics, with creation of new habitats resulting from industrial pollution and destruction of habitats by urbanisation and site remediation. In the present study, we analysed the effect of population history (recent/ancient population) on genetic diversity, fitness and reproductive success in order to discuss conservation strategies for the species. Recently founded populations exhibited similar level of genetic diversity (Hs) as ancient populations but showed a lower genetic differentiation among population (Fst). No indication of strong founder effects in recently established populations was detected. Plant fitness (seed set and germination percentage) was higher in recent populations while other reproductive traits (vegetative density, flower density, fructification percentage) did not differ according to population history. Results suggest that the creation of habitats through human activities can provide new opportunities for conservation of this species. In increasingly disturbed environments, this indicates that, at least for some species, conservation strategies should not focus solely on traditional and natural habitats but also consider the potential benefits offered by modified landscapes. [less ▲]

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See detailProbing the cores of Extreme Horizontal Branch stars by gravity-mode seismology
Van Grootel, Valérie ULg; Charpinet, Stéphane; Fontaine, Gilles et al

Conference (2011, June)

We present a seismic analysis of the pulsating subdwarf B star KPD 0629-0016 on the basis of the long-period, gravity-mode pulsations uncovered by CoRoT. Thanks to space- based facilities, g-mode ... [more ▼]

We present a seismic analysis of the pulsating subdwarf B star KPD 0629-0016 on the basis of the long-period, gravity-mode pulsations uncovered by CoRoT. Thanks to space- based facilities, g-mode seismology can now be exploited quantitatively for stars on the ex- treme horizontal branch, an objective undermined so far by the limitations of ground-based observations. The optimal seismic model offers an excellent fit, with a relative dispersion of 0.23%, to the 18 observed periods identified with theoretical modes of degrees l =1 and 2. The inferred structural parameters for KPD 0629–0016 include the total stellar mass, the thickness of the H-rich envelope, and, thanks to the sensitivity of g-modes, the size and the composition of the convective core. Our results suggest that extra mixing processes shape the helium-burning cores, that are representative of all horizontal branch stars in general, an intermediate and underrated stage of stellar evolution. [less ▲]

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See detailSyntactic complexity of ultimately periodic sets of integers
Rigo, Michel ULg; Vandomme, Elise ULg

Conference (2011, June)

We compute the cardinality of the syntactic monoid of the language 0^∗rep_b(mN) made of base b expansions of the multiples of the integer m. We also give lower bounds for the syntactic complexity of any ... [more ▼]

We compute the cardinality of the syntactic monoid of the language 0^∗rep_b(mN) made of base b expansions of the multiples of the integer m. We also give lower bounds for the syntactic complexity of any (ultimately) periodic set of integers written in base b. We apply our results to some well studied problem: decide whether or not a b-recognizable sets of integers is ultimately periodic. [less ▲]

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See detailThe Postal Sector as a Vector of Financial Inclusion
Gautier, Axel ULg; d'Alcantara, Gonzales

Conference (2011, June)

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See detailRelationship between road surface macrotexture characteristics and CPX noise of a bituminous gap-graded mixture
Luong, Jeanne ULg; Bueno, M.; Vinuela, U. et al

Conference (2011, June)

The aim of this study is to characterize the surface behavior (on an acoustical and a textural level) of bituminous mixtures. The relationship between a road surface characteristic (MPD) and close proxim ... [more ▼]

The aim of this study is to characterize the surface behavior (on an acoustical and a textural level) of bituminous mixtures. The relationship between a road surface characteristic (MPD) and close proxim- ity noise of a bituminous mixture has been analyzed. The survey was conducted by the Laboratory of Acoustic Applied to Civil Engineering (LA2IC) on a test track with two experimental sections paved with ultrathin gap-graded mixtures, with di􏰜erent air void content. Acoustic 􏰝eld measurements of the tire/pavement interaction in close proximity to the contact patch were carried out with a trailer with a protective chamber (TiresonicMk4-LA2IC). Also, measurements of super􏰝cial macrotexture pro􏰝le have been performed with the LaserDynamicPG-LA2IC in order to understand the in􏰞uence of texture on sound generation of the analyzed bituminous mixtures. In this communication it is shown that the macrotexture pro􏰝le of these ultrathin gap-graded pavements has a strong in􏰞uence on the sound generation at intermediate frequencies. Furthermore, it is demonstrated that the commonly accepted belief, that road surfaces with high porosity emit less sound levels, is not always ful􏰝lled. [less ▲]

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See detailSoil seed bank of calamine sites in Belgium: what could be learned for original metallophytes communities restoration?
Bizoux, Jean-Philippe ULg; Mahy, Grégory ULg

Conference (2011, June)

Metalliferous sites often host rare, ecologically endemic taxa adapted to high levels of heavy metals in soils. In Belgium, these sites correspond to Calamine sites. They are often considered as waste ... [more ▼]

Metalliferous sites often host rare, ecologically endemic taxa adapted to high levels of heavy metals in soils. In Belgium, these sites correspond to Calamine sites. They are often considered as waste ground dangerous for human health and public authorities are inclined to promote site remediation by fertilization, ground supply or removal, building ... In the present study, we analysed the seed bank of two ancient calamine sites in order to precise strategies for restoration of calamine original communities by top soil removal and perturbation. Composite soil samples were taken in 5 facies in two sites corresponding to different association. Cores were divided in three layers: litter, 0-5 cm, 5-10 cm. The total number of taxa was 24 taxa at Theux and 15 at Schmalgraf. The most abundant species (68%) are Agrostis capillaries and Viola calaminaria. Seed bank composition appeared different between facies except for three species. The seed bank was dominated by pseudo metallophytes species in Schmalgraf and by metallophytes or other species in Theux. The majority of the species didn’t present significant difference of number of seed between the three layers, except seven species (A. capillaries, V. calaminaria, Silene vulgaris, Minuertia verna, ...) with significant lower number of seed in the layer 5-10 cm. Our result showed that soil seed bank composition refl ect well vegetation communities of the two sites. In addition, because pseudo-metallophyte species as Agrostis capillaries dominated seed bank when they were present in the vegetation, soil removal must be used with parsimony to restore original communities. [less ▲]

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See detailExamples and counter-examples about the S-adic conjecture
Leroy, Julien ULg

Conference (2011, June)

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See detailTissue proteomics of ovarian epithelial cancers.
Longuespée, Rémi ULg; Boyon, Charlotte; Kerdraon, Olivier et al

Conference (2011, June)

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See detailTeaching course: Pearls and pitfalls in headache electrophysiology
MAGIS, Delphine ULg

Conference (2011, June)

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See detailRéflexion éthique à propos de la position du psychothérapeute appelé à témoigner en justice
Blavier, Adelaïde ULg

Conference (2011, June)

Le psychothérapeute (psychologue ou psychiatre) peut être convoqué comme témoin lors d’un procès concernant un de ses patients ou clients. Dans ce cadre, la Loi prévoit une exception à l’obligation du ... [more ▼]

Le psychothérapeute (psychologue ou psychiatre) peut être convoqué comme témoin lors d’un procès concernant un de ses patients ou clients. Dans ce cadre, la Loi prévoit une exception à l’obligation du secret professionnel et autorise le professionnel à dévoiler des éléments liés à la psychothérapie. Cependant, si la Loi autorise la levée du secret professionnel, l’éthique et la déontologie professionnelles ne recommandent pas nécessairement de suivre cette voie. En effet, de nombreuses questions, telles que l’utilité, les risques et les conséquences de cette divulgation, se posent aussi bien au niveau de la relation thérapeutique avec la personne concernée que pour l’ensemble de la profession et le cadre thérapeutique de la pratique clinique de manière générale. Cette communication présente une réflexion autour des divergences qui apparaissent entre ce que préconisent la Loi, l’éthique et la déontologie. En outre, nous proposons d’alimenter la discussion en distinguant les situations dans lesquelles le patient ou client du psychothérapeute est la victime ou au contraire, l’auteur de faits délictueux. [less ▲]

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See detailGBS colonization and screening in pregnancy: how does it work in Europe?
MELIN, Pierrette ULg

Conference (2011, June)

In Europe, as in North America, GBS infections among infants are associated to high morbidity and mortality even if some differences exist between different European countries. During the past two decades ... [more ▼]

In Europe, as in North America, GBS infections among infants are associated to high morbidity and mortality even if some differences exist between different European countries. During the past two decades, major initiatives have been proposed to prevent early onset GBS disease (EOD) and they are still subject of controversy. Several European countries have issued guidelines for the prevention of neonatal GBS diseases, either universal screening-based or risk-based strategy, others have no official guidelines at all. In countries having guidelines, despite considerable efforts and economic resources spent on intrapartum antimicrobial prophylaxis for GBS EOD, cases continue to occur. Among these cases there are a lot of missed opportunities to administer IAP but there are also false negative screening. Therefore in the setting of a maternal GBS-screening program and successful implementation of the strategy, efforts to improve screening for GBS status remain important. The natural reservoir for GBS is the gastrointestinal tract and is likely the source for vaginal colonization. Among pregnant women, GBS carriage rate in the vaginal and rectal flora ranges from 10% up to 30%. Critical factors that influence the accuracy of detecting GBS maternal colonization are the choice of the body sites sampled, the timing of sampling and the use of selective culture media. The evolution of the different culture options to improve the GBS-screening strategy will be reviewed. If the optimal time for performing antenatal cultures is between 35 to 37 weeks’ gestation, as GBS carriage is highly variable, the predictive values of GBS antenatal cultures are not always as good predictors of the maternal GBS status at presentation for delivery as expected. Potential alternative to antenatal GBS-screening culture is the identification of GBS colonization at presentation for delivery. Use of a reliable, sensitive, easy to use rapid test should be cost effective leading to the prevention of more EOGBS cases while reducing the number of unnecessarily IAP. Advances of polymerase chain reaction (PCR) and fluorescence labeling technologies has provided new detection tools for bacterial identification. Therefore, commercialization of rapid detection of GBS through real-time PCR offers the potential for GBS detection among women without prenatal care or those in whom no antenatal culture was collected. However questions of costs and logistics remain unanswered. Could such rapid intrapartum test replace existing screening strategies or could it be used in conjunction with them? Colonizing rates and recommended screening procedures existing through Europe will be reviewed. [less ▲]

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See detailL'évaluation des compétences : principes et illustrations
Poumay, Marianne ULg; Leclercq, Dieudonné ULg

Conference (2011, May 31)

Cette conférence rappelle la définition que donne Jacques Tardif (2006) de la compétence et un cadrage quant aux situations authentiques (Prégent et al, 2009), puis illustre différentes modalités ... [more ▼]

Cette conférence rappelle la définition que donne Jacques Tardif (2006) de la compétence et un cadrage quant aux situations authentiques (Prégent et al, 2009), puis illustre différentes modalités pédagogiques permettant de soutenir le développement de ces compétences et leur évaluation. Elle illustre notamment les méthodes suivantes : études de cas, jeux de rôles, stages, portfolios et cartographie conceptuelle. [less ▲]

Detailed reference viewed: 254 (32 ULg)